Finding the Fourth Proportional to 1,985.97, 2,740.56 and 1,089.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.97 : 2,740.56 = 1,089.69 : x
2. Step 2: Convert to fraction form
   1,985.97/2,740.56 = 1,089.69/x
3. Step 3: Cross multiply
   1,985.97x = 2,740.56 × 1,089.69
4. Step 4: Simplify right side
   1,985.97x = 2,986,360.83
5. Step 5: Solve for x
   x = 2,986,360.83/1,985.97
6. Step 6: Final answer
   x = 1,503.73